Ventilation mode function - GF91.30-P-2005T

MODEL 211.0/2/6 with CODE (401) Front luxury seat, incl. heated seat and seat ventilation 

Function requirements 

• Circuit 15R ON
• Circuit 15 ON

Function driver side 

The actuation of the left front seat ventilation switch (N72/1s13) is read in by the upper control panel control unit (N72/1) and forwarded via CAN interior to the HS and seat ventilation control unit (N25/7).

The HS and seat ventilation control unit (N25/7) issues a control voltage, depending on the current power stage, to the blower regulator for left front seat ventilation (N29/5). It controls, depending on the control voltage, the supply voltage of the left front seat cushion ventilation motor group (M18/9) and the left front backrest ventilation motor group (M18/10).

Function passenger side 

The actuation of the right front seat ventilation switch (N72/1s14) is read in by the upper control panel control unit (N72/1) and forwarded via CAN interior to the HS and seat ventilation control unit (N25/7).

The HS and seat ventilation control unit (N25/7) issues a control voltage, depending on the current power stage, to the blower regulator for right front seat ventilation (N29/6). It controls, depending on the control voltage, the supply voltage of the right front seat cushion ventilation motor group (M18/11) and the right front backrest ventilation motor group (M18/12).

Operation and function indicators of the seat ventilation are summarized in the table given below.

Switch over with switch (explanation at driver-side seat ventilation) 

By pressing the left front seat ventilation switch (N72/1s13), it is possible to manually switch

• over from ventilation stage 3 to ventilation stage 2.
• over from ventilation stage 2 to ventilation stage 1.
• off the seat ventilation.

The HS and seat ventilation control unit (N25/7) reduces the control voltage to the left front seat ventilation blower regulator (N29/5) accordingly, and thus it reduces the supply voltage of the left front seat cushion ventilation motor group (M18/9) and the left front backrest ventilation motor group (M18/10).

Operation and function indicators of the seat ventilation are summarized in the table given below.

Switching on seat ventilation in the case of comfort opening 

When opening the windows and sliding roof with the remote control (comfort opening) or by Keyless Go, the seat ventilation is switched on to ventilation stage 3 irrespective of the function conditions.

When closing, the seat ventilation is switched off again.

Switch position	Ventilation	Control voltage to blower regulator	Function display
press once	Ventilation stage 3	4,5 Volt	3 LEDs blue
press twice	Ventilation stage 2	3,3 Volt	2 LEDs blue
press three times	Ventilation stage 1	2,0 Volt	1 LED blue
press four times	Seat ventilation off	less than 1.0 Volt	None
Press five times	Ventilation stage 3	4,5 Volt	3 LEDs blue

Heated seats/seat ventilation switch location/task		GF91.30-P-3004T
Seat ventilation blower regulator, location/task/design/function		GF91.30-P-3102T
Front seat ventilation motors, location/task/design/function		GF91.30-P-3100T
Heated seats/seat ventilation control unit, location/task		GF91.30-P-3005T
Upper control panel control unit, location/task/design/function	Models 211.0/6.	GF54.21-P-4105T
	Model 211.2.	GF54.21-P-4105TS